4 Questions from the Community

Electrical outlets in Europe are 220-240V and generally 50 Hz. I have a "travel converter" that can plug into that and have as output 110-120V. But, it will not adjust the European frequency from 50 Hz to what is used in the U.S., 60 Hz. I wish to charge up my MacBook Pro (13-inch, 2011 vintage) using the supplied (original) U.S. power adapter (Apple 60W MagSafe Power Adapter), which will then be plugged into the travel converter, which would be supplying 110-120V at 50Hz. Is this okay, or will there be any problem?